Make the highlight selection and the marking more robust

Also cover the case when there are paragraphs and unordered lists in the
same ContentComponent

client/src/components/content-blocks/ContentComponent.vue

@@ -18,6 +18,7 @@
     <component
       v-bind="component"
       :parent="parent"
+      class="content-component__content"
       :is="componentType"
     />
   </div>
@@ -148,16 +149,22 @@ const componentClass = computed(() => {
   }
   return classes;
 });
-const paragraphs = computed(() => {
+const childElements = computed(() => {
   if (contentComponentDiv.value) {
-    let elements: HTMLCollection;
-    elements = contentComponentDiv.value.getElementsByTagName('p');
-    if (!elements.length) {
-      const uls = contentComponentDiv.value.getElementsByTagName('ul');
-      const ul = uls[0];
-      elements = ul.getElementsByTagName('li');
+    const parent = contentComponentDiv.value.querySelector('.content-component__content');
+    if (!parent) {
+      console.warn('Parent does not exist, this should not be possible');
+      // or can it be, if the children did not load yet, e.g. with a dynamic component?
+      return [];
     }
-    return elements;
+    // make a flat list from all <li>-elements and all the others
+    const elements = Array.from(parent.children).reduce((acc: Element[], current: Element) => {
+      if (current.tagName.toLowerCase() === 'ul') {
+        return [...acc, ...current.children];
+      }
+      return [...acc, current];
+    }, []);
+    return elements as HTMLElement[];
   }
   return [];
 });
@@ -165,7 +172,7 @@ const paragraphs = computed(() => {
 watch(
   () => filteredHighlights.value.map((h) => h.color),
   () => {
-    for (const paragraph of paragraphs.value) {
+    for (const paragraph of childElements.value) {
       const instance = new Mark(paragraph);
       instance.unmark();
     }
@@ -234,7 +241,7 @@ const { mutate: doDeleteHighlight } = useMutation(
 
 const markHighlights = () => {
   for (const highlight of filteredHighlights.value) {
-    const element = paragraphs.value[highlight.paragraphIndex];
+    const element = childElements.value[highlight.paragraphIndex];
     const instance = new Mark(element);
     const ranges: Mark.Range[] = [
       {

client/src/directives/highlight.ts

@@ -95,6 +95,30 @@ const findPositionInParent = (element: HTMLElement, className: string = 'content
   return children.indexOf(element);
 };
 
+const getParentElement = (element: HTMLElement): HTMLElement | null => {
+  if (element.tagName.toLowerCase() === 'li') {
+    return element.parentElement?.parentElement || null;
+  } else {
+    return element.parentElement || null;
+  }
+};
+
+const getSiblings = (element: HTMLElement): Element[] => {
+  const parent = getParentElement(element);
+  if (!parent) {
+    throw Error('element has no parent, this should not be possible');
+  }
+  let children: Element[] = [];
+  for (const child of parent.children) {
+    if (child.tagName.toLowerCase() === 'ul') {
+      children = [...children, ...child.children];
+    } else {
+      children = [...children, child];
+    }
+  }
+  return children;
+};
+
 export const getSelectionHandler =
   (el: HTMLElement, contentBlock: ContentBlockNode, onUpdateHighlight: (highlight: any) => void = () => {}) =>
   (_e: Event) => {
@@ -123,11 +147,13 @@ export const getSelectionHandler =
             if (contentComponent) {
               // our selection is wholly inside the container node, we continue with it
               const position = findPositionInParent(contentComponent);
-              const siblings = Array.from(startAncestor.parentElement?.children || []);
+              const uuid = contentComponent.dataset.uuid || '';
+
+              // const siblings = Array.from(startAncestor.parentElement?.children || []);
+              const siblings = getSiblings(startAncestor);
               const positionInTextBlock = siblings.indexOf(startAncestor);
 
               const { start, end } = range.toCharacterRange(startAncestor);
-              const uuid = contentComponent.dataset.uuid || '';
               const highlightedText: Highlight = {
                 contentBlock: contentBlock.id,
                 contentIndex: position,
@@ -137,7 +163,6 @@ export const getSelectionHandler =
                 selectionLength: end - start,
                 text: range.toString(),
               };
-              console.log(highlightedText);
 
               const positionOfContentBlock = el.getBoundingClientRect();
               const positionOfSelection = startAncestor?.getBoundingClientRect();

client/tsconfig.app.json

@@ -4,7 +4,7 @@
     "checkJs": false,
     "resolveJsonModule": true,
     "allowSyntheticDefaultImports": true,
-    "lib": ["es2017", "dom"],
+    "lib": ["es2017", "dom", "dom.iterable"],
     "target": "es6",
     "module": "es2022",
     "strict": true,